Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf...39t&link_type=abstract
"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
Astrometry with ground based optical telescopes is a newly developed theme in the SYRTE department of the Paris observatory. It recovers some activities like: - the observation of the WMAP probe with optical telescopes for the future astrometric monitoring of GAIA, - the realization of an ecliptic catalog of quasars (using the CFHT images), - the link between radio and optical positions of quasars. In the case of WMAP we will detail more particularly the observations made with the ESO 2.2 m telescope and with the 105 cm telescope of the Pic du Midi. Our goal is to be able to obtain the position of GAIA on its orbit with an uncertainty of 150m in position and 2.5 mm/s in velocity. For that purpose, the telescope of the Pic du Midi could be used as a main observing station when GAIA will be launch. We will give the firsts results obtain for the astrometric reduction of the images of WMAP obtain with these two telescopes. We also present the CFHT-LS project. We will use the images of the Very Wide survey to realize an astrometric catalog of quasars. The goal of this project is to obtain the position of quasars with an uncertainty around 10mas up to the 25th magnitude. It will permit to densify the GAIA catalog.
Albert-Aguilar A.
Andrei Alexander H.
Bouquillon Sébastien
Souchay Jean
Taris François
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